I've never understood most of the issues with Perrin. People get mad at him for killing the man who broke his own code of morality to abduct Perrin's wife, while trying to abuse his superior position to induce her prostitute herself. People get mad at him for ignoring his mission to rescue his wife, which is not at all true.

IDK what this was about, but as far back as EotW, he was usually right in his insights and analysis. He called bullshit on the Tinkers, in a way that exposed Aram's hypocrisy, and did something similar with Egwene, to expose the selfishness of her position vis a vis Elyas, and her lack of consideration of his opinions. For all that Rand knows her better, Rand never makes her as embarrassed as Perrin does. He saw the dangers in Egwene playing with the One Power without training, which Verin later confirmed. He was smarter about trying to fool Bornhald when they were taken by the Children of the Light, when Egwene wanted to stick with their absurd ruse. He saw through Byar's subterfuge to kill them under the pretense of escape. When he escaped Shadar Logoth, he kept his head and thought more clearly about the job ahead and what he needed to do than Rand or Mat or Egwene did, despite each of them getting out with more resources.

In the next book, he figures out that Rand can channel, and seems to understand how that affected Rand's behavior. Later on, he is the first to notice Rand's new change in demeanor that none of the girls pick up on until tSR. No one mentions it explicitly, and since we see Perrin through no other PoV character's eyes in tDR, we don't get to notice it externally, but even if he is not conscious of this fact, it is plain that the Shienarans have come to respect him in his own right, not just "because Moiraine says so." He does a much better job of standing up to Moiraine, and being right on more than one occasion than any other of the TR folks had to that point.

In the middle books, his biggest blindspots had to do with her misapplied perceptions of Faile, due to cultural differences (it's more than just the yelling thing). Outside of relationship confusion, he's really good in his assessments of people and situations.